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pfSense 2.4.4-p3 Cross Site Scripting

pfSense 2.4.4-p3 Cross Site Scripting
Posted May 28, 2019
Authored by Chi Tran

pfSense version 2.4.4-p3 with ACMEPackage version 0.5.7_1 suffers from a persistent cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2019-12347
MD5 | 201e068f480561654bc1a9ad85f752da

pfSense 2.4.4-p3 Cross Site Scripting

Change Mirror Download
# Exploit Title: pfSense 2.4.4-p3 (ACMEPackage 0.5.7_1) - Stored Cross-Site Scripting 
# Date: 05.28.2019
# Exploit Author: Chi Tran
# Vendor Homepage: https://www.pfsense.org
# Version: 2.4.4-p3/0.5.7_1
# Software Link: N/A
# Google Dork: N/A
# CVE:2019-12347

##################################################################################################################################
Introduction pfSense® software is a free, open source customized distribution of FreeBSD specifically tailored for use as a firewall and router that is entirely managed via web interface.
In addition to being a powerful, flexible firewalling and routing platform, it includes a long list of related features and a package system allowing further expandability without adding bloat and potential security vulnerabilities to the base distribution.

The ACME Package for pfSense interfaces with Let’s Encrypt to handle the certificate generation, validation, and renewal processes. (https://docs.netgate.com/pfsense/en/latest/certificates/acme-package.html)
#################################################################################

Proof of Concepts:

1 - Navigate to https://192.168.1.1/acme/acme_accountkeys_edit.php
2 - In the "Name" and "Description" field, input payload: "><svg/onload=alert(1)>
3 - XSS box will then pop-up

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